The difference between self-drilling and self-tapping screws is that ordinary self-tapping screws must go through two processes of drilling (drilling the bottom hole of the thread) and tapping (including fastening the connection) when connecting; while self-drilling and self-tapping When the screws are connected, the two processes of drilling and tapping are combined and completed at one time.
TORX SELF-TAPPING SCREW M3-L8-
